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PESSTO spectroscopic classification of optical transients

ATel #8600; N. Elias-Rosa (INAF Padova), G. Terreran (QUB, INAF Padova), A. Cikota (ESO), S. Benetti, L. Tomasella (INAF Padova), J. Anderson (ESO), M. Fraser (Univ. Cambridge), C. Inserra (QUB), E. Kankare (QUB), K. Maguire (QUB), S. J. Smartt (QUB), K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron (Weizmann), D. Young (QUB), I. Manulis (Weizmann), L. Wyrzykowski,(Warsaw Observatory, Poland), D. Wright (QUB), K. Chambers, H. Flewelling, M. Huber, E. Magnier, J. Tonry, C. Waters, R. J. Wainscoat (IfA, Univ. Hawaii)
on 28 Jan 2016; 16:31 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Lina Tomasella (lina.tomasella@oapd.inaf.it)

Subjects: Optical, Supernovae

PESSTO, the Public ESO Spectroscopic Survey for Transient Objects (see Smartt et al. 2015, A&A, 579, 40 http://www.pessto.org ), reports the following supernova classifications. Targets were supplied by Pan-STARRS Survey for Transients (see Huber et al., ATel #7153), and OGLE-IV Real-time Transient Search (Wyrzykowski et al., 2014 arxiv:1409.1095; http://ogle.astrouw.edu.pl/ ). All observations were performed on the ESO New Technology Telescope at La Silla on 2016 January 28th, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) and GELATO (Harutyunyan et al., 2008, A&A, 488, 383). Classification spectra can be obtained from http://www.pessto.org (via WISeREP).

  
Name      | RA (J2000)  | Dec (J2000) | Disc. Date | Disc. Source |Disc Mag|   z   |  Type  |  Phase  | Notes 
OGLE15xx  | 05:35:40.35 | -66:20:48.5 | 2015-12-17 | OGLE         |  20.75 | 0.21: |SNIc-pec|   ~+10  | a  
AT 2016ad | 09:16:40.72 | +22:17:52.7 | 2016-01-08 | PS1-QUB      |  19.20 | 0.05  |SNIa    |   +7    | b  
PS16yx    | 13:37:36.31 | -29:21:20.7 | 2016-01-24 | PS1-QUB      |  19.28 | 0.091 |SNIa    |   max   | c  
PS16uk    | 09:31:42.51 | -30:13:01.1 | 2016-01-22 | PS1-QUB      |  17.83 | 0     |CV?     |   ---   | d  

a. Reasonable matches with SLSN 2010gx (Pastorello et al 2010, ApJ 724, L16) at z~0.21, or with SN 2003jd (Valenti et al 2008, MNRAS 383, 1485) close to maximum at a z~0.08; this last match would make the OGLE15xx luminosity similar to that of the intermediate luminosity SN, PS1-10bzj (Lunnan et al. 2013, ApJ 771, 97).

b. Also known as PS16je.

c. The redshift from a narrow Halpha coincides with that derived by SNID from spectral match.

d. The low S/N spectrum is characterised by a blue continuum and narrow Halpha, Hbeta and Hgamma emissions at rest wavelength. There is a trace of He I emission at 587.6 nm, while all other expected lines for a CV variable are drowned in the noise.